To activate your tuning fork, hold it as as possible to of the handle. For best results, the tuning fork gently against a hard surface near where the tines end. Note that you do not need to the tuning fork very hard against an object to activate it. : Adjusting the fork effectively relieves stress and tension for peace of mind and deep relaxation. The vibrational frequency released after the tap gently stimulates the cells to release nitric oxide, bringing about a state of and mental stability and relaxation. Suitable for people with , improving insomnia, psychological trauma, anxiety, Reiki practice, meditation, teaching, etc. Beautiful Gift : With an elegant bag and thoughtful design, this adjustment fork set is a great gift for 's Day, Father's Day, Graduation, Birthday, Promotion, Vacation. This is a great gift for yoga teachers, meditation lovers, music lovers and hard worker. It will bring clear and sound to everyone, even your lovely pets. Frequency: 528HZ Material: Aluminum Alloy Color: As shown Package Contents: 1 x tuning fork 1 x mallet (random color and style Do not accept designation) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.